CN207533812U - One kind is unilateral to be walked to expect drawing die - Google Patents

Abstract

The utility model discloses a single-side feeding drawing die, which comprises a first side and a second side oppositely arranged along the vertical direction, wherein the first side corresponds to the side where the non-coding area of the molding is located, and the The second side corresponds to the side where the coding area of the molded part is located. An upward arc-shaped protrusion is arranged on the second side, and a concave circular drawbead is arranged on the first side. The two sides are provided with concave square drawbeads, the gap between the upper and lower dies on the first side is larger than the material thickness of the formed part, and the gap between the upper and lower dies on the second side is smaller than the material thickness of the formed part. The single-side feeding drawing die can meet the quality requirements of the size and appearance of the one-side appearance surface of the molded part without increasing the number of dies, changing the structure of the die, and increasing the complexity of the die by using the improvement of the die process shape. , so that there is no material trace in the coding area of the molded part, ensuring the integrity and clarity of the subsequent identification code engraved in this area.

Description

A single-side feeding drawing die

technical field

The utility model relates to the technical field of moulds, in particular to a single-side feeding drawing mould.

Background technique

When conventional parts are drawn and formed, the resistance design of the drawbeads on both sides of the mold remains consistent, and the pressing force on both sides of the forming will also remain consistent, so that the materials on both sides are fed at the same time during the stretching forming process to maintain the material pressing force. Evenly, in order to achieve the expected molding effect.

After conventional parts are drawn and formed, there are many shrinkage lines of the material sheet, and there will be traces of material running on the formed parts, which cannot meet the size and appearance requirements of the secondary appearance parts, resulting in the inability to complete coding in the subsequent process. For example, in the field of automobile manufacturing, the identification code of the vehicle needs to be engraved on the body-in-white parts. The requirements for this type of parts are higher than those of the general body-in-white parts. There are special requirements for the coding area of the parts. The area needs to ensure the particularity of appearance and size, without marks, and the appearance should be flat and smooth. The existing drawing dies cannot meet the special appearance and size requirements of the coding area of the formed part.

Utility model content

The technical problem mainly solved by the utility model is to provide a single-side feeding drawing die, which can realize no trace of feeding in the coding area of the formed part, so as to ensure the integrity and clarity of the coding in the rear section.

In order to solve the above technical problems, the technical solution adopted by the utility model is to provide a single-side feeding drawing die, including a first side and a second side oppositely arranged along the vertical direction, wherein the first side corresponds to On the side where the non-coding area of the molding is located, the second side corresponds to the side where the coding area of the molding is located, and an upward arc-shaped protrusion is provided on the second side; a recess is provided on the first side The circular drawbead is provided with a concave square drawbead on the second side; the gap between the upper and lower dies on the first side is larger than the material thickness of the formed part, and the gap between the upper and lower dies on the second side is smaller than the forming The material thickness of the piece.

Preferably, the friction coefficient of the square drawbead is set to be twice the friction coefficient of the circular drawbead.

Preferably, the friction coefficient of the circular drawbead is set to 0.25, and the friction coefficient of the square drawbead is set to 0.5.

Preferably, the depth of the square drawbead is three times that of the circular drawbead.

Preferably, the top rounding radius of the square drawbead is smaller than the top rounding radius of the circular drawbead, and the bottom rounding radius of the square drawbead is smaller than that of the circular drawbead The bottom round radius of .

Preferably, the gap between the upper and lower dies on the first side is set at 101%-102% of the material thickness of the molding.

Preferably, the gap between the upper and lower dies on the second side is set at 88% to 90% of the material thickness of the molding.

The beneficial effects of the utility model are: the unilateral feed drawing die provided by the utility model can meet the requirements of The size and appearance quality requirements of one side of the molded part ensure that there is no material trace in the coding area of the molded part, and ensure the integrity and clarity of the subsequent identification code engraved in this area.

Description of drawings

Fig. 1 is a schematic top view of a single-side feed drawing die in a preferred embodiment of the present invention;

Fig. 2 is a schematic sectional view of A-A in Fig. 1;

Fig. 3 is an enlarged view of the circular drawbead of the unilateral feeding drawing die in a preferred embodiment of the utility model;

Fig. 4 is an enlarged view of a square drawbead of a single-side feeding drawing die in a preferred embodiment of the present invention.

The marks of the components in the drawings are as follows: 11-first side; 111-circular drawbead; 12-second side; 121-arc-shaped protrusion; 122-square drawbead.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

An embodiment of the utility model provides a single-side feeding drawing die, which realizes the single-side feeding of the drawing die by using the improvement of the mold process shape, and can meet the requirements of the size and appearance of the one-side appearance surface of the formed part , so that there is no material trace in the coding area of the molded part, ensuring the integrity and clarity of the subsequent identification code engraved in this area.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is a schematic top view of the unilateral feeding drawing die in this embodiment, Fig. 2 is a schematic cross-sectional view of A-A in Fig. 1, the unilateral feeding drawing die includes a vertical The first side 11 and the second side 12 are arranged in opposite directions, wherein the first side 11 corresponds to the side where the non-coding area of the molding is located, and the second side 12 corresponds to the side where the coding area of the molding is located. In this embodiment, the molding area is on the right side wall of the molding, the second side 12 corresponds to the right side wall of the molding, and the first side 11 corresponds to the left side of the molding wall.

An upward arc-shaped protrusion 121 is provided on the second side 12 of the single-side feeding drawing die. Correspondingly, an upwardly protruding step shape is formed on the right side wall of the molding. When the molded part is stamped and stretched, the arc-shaped protrusion 121 can generate resistance to the molding material, so as to avoid material leakage of the molding material on the second side 12 during the molding process, as well as the occurrence of leakage on the right side wall of the molded part. Material slip lines and indentations.

The first side 11 of the single-side feeding drawing die is provided with a concave circular drawbead 111, and the second side 12 is provided with a concave square drawbead 122, which is more circular. The drawbeads 111 and square drawbeads 122 exert greater pressure on the molding material, prompting the molding material to feed from the side of the circular drawbead 111 with less pressure, and avoid the molding material from the side of the square drawbead 122 with high pressure material, further preventing material traces from being produced on the right side wall of the molded part.

Please refer to Fig. 3 and Fig. 4 at the same time. Fig. 3 is an enlarged view of the circular drawing bead 111 of the single-side feeding drawing die in a preferred embodiment of the present invention, and Fig. 4 is a preferred embodiment of the present invention An enlarged view of the square draw bead 122 of the single-side feeding drawing die. In this embodiment, the depth of the square draw bead 122 is set to be three times that of the circular draw bead 111; The top rounding radius of the draw bead is smaller than the top rounding radius of the circular draw bead, the bottom rounding radius of the square draw bead is smaller than the bottom rounding radius of the circular draw bead, In order to further increase the feed resistance on one side of the square draw bead 122, reduce the feed resistance on the side of the circular draw bead 111, so that the forming material can be fed in all sides of the unilateral feeding drawing die. The first side 11 is covered with material, and the second side 12 is not covered with material. Therefore, there will be no traces of material removed on the right side wall where the coding area of the molded part is located. In one embodiment, the top of the circular drawbead 111 is rounded with R6 and the bottom is rounded with R7; the top of the square drawbead 122 is rounded with R3 and the bottom is rounded with R3.

In this embodiment, the friction coefficient of the square draw bead 122 is set to twice the friction coefficient of the circular draw bead 111, which further increases the resistance pressure of the side 12 where the square draw bead 122 is located, so that There is no material feeding on this side, and the molding material is encouraged to feed from the first side 11 with relatively low molding resistance. After the drawing forming is completed, the shrinkage line on the right side wall of the forming part corresponding to the large friction coefficient of the drawing bead is obviously less, and the appearance after forming is good, which can ensure the integrity and clarity of subsequent coding in this side area. Further, the friction coefficient of the circular draw bead 111 is set to 0.25, and the friction coefficient of the square draw bead 122 is set to 0.5.

Usually, for parts without appearance requirements, the gap between the upper and lower molds is equal to the material thickness of the molded part to ensure uniform feeding during the molding process. In this embodiment, the gap L1 between the upper and lower molds of the first side 11 is set to be greater than the material thickness of the molding, and the gap L2 between the upper and lower molds of the second side 12 is set to be smaller than the material thickness of the molding, so that the first The two sides 12 press the molding material more tightly than the first side 11, and the molding material does not produce material leakage on the second side 12, which ensures that the right side wall of the molded part is smooth and smooth without leakage. The molding material relaxes the pressing force on the molding material on the first side 11 to ensure that the molding material can smoothly slide into the mold cavity to achieve the desired molding effect. Further, the gap L1 between the upper and lower molds on the first side 11 is set to 101% to 102% of the material thickness of the molding, and the gap L2 between the upper and lower molds on the second side 12 is set to 88% to 90% of the material thickness of the molding . Preferably, the upper and lower mold clearance L1 of the first side 11 is set to 102% of the material thickness of the molding, and the upper and lower mold clearance L2 of the second side 12 is set to 90% of the molding material thickness.

In summary, this embodiment increases the resistance and resistance of the second side 12 corresponding to the side of the coding area of the molded part to the molding material during the molding process through the improvement of the process shape of the unilateral feeding drawing die. The pressure correspondingly reduces the resistance and pressure of the first side 11 corresponding to the side of the non-coding area of the molded part to the molding material, and promotes the molding material to flow from the first side 11, and on the second side 12 There is no material loss, which can meet the size and appearance requirements of one side of the molded part, so that there is no material loss in the coding area of the molded part, ensuring the integrity and clarity of the subsequent identification code engraved in this area.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (7)

1. A single-side feeding drawing die, comprising a first side and a second side oppositely arranged in the vertical direction, wherein the first side corresponds to the side where the non-coding area of the molding is located, and the second side The side corresponding to the side where the coding area of the molding is located is characterized in that an upward arc-shaped protrusion is provided on the second side; a concave circular drawbead is provided on the first side, and on the The second side is provided with concave square drawbeads; the gap between the upper and lower dies on the first side is larger than the material thickness of the formed part, and the gap between the upper and lower dies on the second side is smaller than the material thickness of the formed part. 2. The single-side feeding drawing die according to claim 1, wherein the friction coefficient of the square draw bead is set to be twice the friction coefficient of the circular draw bead. 3. The single-side feeding drawing die according to claim 2, wherein the friction coefficient of the circular draw bead is set to 0.25, and the friction coefficient of the square draw bead is set to 0.5. 4. The single-side feeding drawing die according to claim 1, wherein the depth of the square draw bead is three times that of the circular draw bead. 5. The single-side feeding drawing die according to claim 1, characterized in that, the top rounding radius of the square drawbead is smaller than the top rounding radius of the circular drawbead, and the The bottom fillet radius of the square drawbead is smaller than the bottom fillet radius of the circular drawbead. 6 . The single-side feeding drawing die according to claim 1 , wherein the gap between the upper and lower dies on the first side is set at 101%-102% of the material thickness of the formed part. 7. The single-side feeding drawing die according to claim 1, characterized in that, the gap between the upper and lower dies on the second side is set to be 88%-90% of the material thickness of the formed part.